Android APIs
public final class

Character

extends Object
implements Serializable Comparable<Character>
java.lang.Object
   ↳ java.lang.Character

Class Overview

The wrapper for the primitive type char. This class also provides a number of utility methods for working with characters.

Character data is kept up to date as Unicode evolves. See the Locale data section of the Locale documentation for details of the Unicode versions implemented by current and historical Android releases.

The Unicode specification, character tables, and other information are available at http://www.unicode.org/.

Unicode characters are referred to as code points. The range of valid code points is U+0000 to U+10FFFF. The Basic Multilingual Plane (BMP) is the code point range U+0000 to U+FFFF. Characters above the BMP are referred to as Supplementary Characters. On the Java platform, UTF-16 encoding and char pairs are used to represent code points in the supplementary range. A pair of char values that represent a supplementary character are made up of a high surrogate with a value range of 0xD800 to 0xDBFF and a low surrogate with a value range of 0xDC00 to 0xDFFF.

On the Java platform a char value represents either a single BMP code point or a UTF-16 unit that's part of a surrogate pair. The int type is used to represent all Unicode code points.

Unicode categories

Here's a list of the Unicode character categories and the corresponding Java constant, grouped semantically to provide a convenient overview. This table is also useful in conjunction with \p and \P in regular expressions.

Cn Unassigned UNASSIGNED
Cc Control CONTROL
Cf Format FORMAT
Co Private use PRIVATE_USE
Cs Surrogate SURROGATE

Lu Uppercase letter UPPERCASE_LETTER
Ll Lowercase letter LOWERCASE_LETTER
Lt Titlecase letter TITLECASE_LETTER
Lm Modifier letter MODIFIER_LETTER
Lo Other letter OTHER_LETTER

Mn Non-spacing mark NON_SPACING_MARK
Me Enclosing mark ENCLOSING_MARK
Mc Combining spacing mark COMBINING_SPACING_MARK

Nd Decimal digit number DECIMAL_DIGIT_NUMBER
Nl Letter number LETTER_NUMBER
No Other number OTHER_NUMBER

Pd Dash punctuation DASH_PUNCTUATION
Ps Start punctuation START_PUNCTUATION
Pe End punctuation END_PUNCTUATION
Pc Connector punctuation CONNECTOR_PUNCTUATION
Pi Initial quote punctuation INITIAL_QUOTE_PUNCTUATION
Pf Final quote punctuation FINAL_QUOTE_PUNCTUATION
Po Other punctuation OTHER_PUNCTUATION

Sm Math symbol MATH_SYMBOL
Sc Currency symbol CURRENCY_SYMBOL
Sk Modifier symbol MODIFIER_SYMBOL
So Other symbol OTHER_SYMBOL

Zs Space separator SPACE_SEPARATOR
Zl Line separator LINE_SEPARATOR
Zp Paragraph separator PARAGRAPH_SEPARATOR

Summary

Nested Classes
class Character.Subset  
class Character.UnicodeBlock Represents a block of Unicode characters. 
Constants
byte COMBINING_SPACING_MARK Unicode category constant Mc.
byte CONNECTOR_PUNCTUATION Unicode category constant Pc.
byte CONTROL Unicode category constant Cc.
byte CURRENCY_SYMBOL Unicode category constant Sc.
byte DASH_PUNCTUATION Unicode category constant Pd.
byte DECIMAL_DIGIT_NUMBER Unicode category constant Nd.
byte DIRECTIONALITY_ARABIC_NUMBER Unicode bidirectional constant AN.
byte DIRECTIONALITY_BOUNDARY_NEUTRAL Unicode bidirectional constant BN.
byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR Unicode bidirectional constant CS.
byte DIRECTIONALITY_EUROPEAN_NUMBER Unicode bidirectional constant EN.
byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR Unicode bidirectional constant ES.
byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR Unicode bidirectional constant ET.
byte DIRECTIONALITY_LEFT_TO_RIGHT Unicode bidirectional constant L.
byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING Unicode bidirectional constant LRE.
byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE Unicode bidirectional constant LRO.
byte DIRECTIONALITY_NONSPACING_MARK Unicode bidirectional constant NSM.
byte DIRECTIONALITY_OTHER_NEUTRALS Unicode bidirectional constant ON.
byte DIRECTIONALITY_PARAGRAPH_SEPARATOR Unicode bidirectional constant B.
byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT Unicode bidirectional constant PDF.
byte DIRECTIONALITY_RIGHT_TO_LEFT Unicode bidirectional constant R.
byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC Unicode bidirectional constant AL.
byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING Unicode bidirectional constant RLE.
byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE Unicode bidirectional constant RLO.
byte DIRECTIONALITY_SEGMENT_SEPARATOR Unicode bidirectional constant S.
byte DIRECTIONALITY_UNDEFINED Unicode bidirectional constant.
byte DIRECTIONALITY_WHITESPACE Unicode bidirectional constant WS.
byte ENCLOSING_MARK Unicode category constant Me.
byte END_PUNCTUATION Unicode category constant Pe.
byte FINAL_QUOTE_PUNCTUATION Unicode category constant Pf.
byte FORMAT Unicode category constant Cf.
byte INITIAL_QUOTE_PUNCTUATION Unicode category constant Pi.
byte LETTER_NUMBER Unicode category constant Nl.
byte LINE_SEPARATOR Unicode category constant Zl.
byte LOWERCASE_LETTER Unicode category constant Ll.
byte MATH_SYMBOL Unicode category constant Sm.
int MAX_CODE_POINT The maximum code point value, U+10FFFF.
char MAX_HIGH_SURROGATE The maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.
char MAX_LOW_SURROGATE The maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.
int MAX_RADIX The maximum radix used for conversions between characters and integers.
char MAX_SURROGATE The maximum value of a surrogate unit in UTF-16 encoding, '?'.
char MAX_VALUE The maximum Character value.
int MIN_CODE_POINT The minimum code point value, U+0000.
char MIN_HIGH_SURROGATE The minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.
char MIN_LOW_SURROGATE The minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.
int MIN_RADIX The minimum radix used for conversions between characters and integers.
int MIN_SUPPLEMENTARY_CODE_POINT The minimum value of a supplementary code point, U+010000.
char MIN_SURROGATE The minimum value of a surrogate unit in UTF-16 encoding, '?'.
char MIN_VALUE The minimum Character value.
byte MODIFIER_LETTER Unicode category constant Lm.
byte MODIFIER_SYMBOL Unicode category constant Sk.
byte NON_SPACING_MARK Unicode category constant Mn.
byte OTHER_LETTER Unicode category constant Lo.
byte OTHER_NUMBER Unicode category constant No.
byte OTHER_PUNCTUATION Unicode category constant Po.
byte OTHER_SYMBOL Unicode category constant So.
byte PARAGRAPH_SEPARATOR Unicode category constant Zp.
byte PRIVATE_USE Unicode category constant Co.
int SIZE The number of bits required to represent a Character value unsigned form.
byte SPACE_SEPARATOR Unicode category constant Zs.
byte START_PUNCTUATION Unicode category constant Ps.
byte SURROGATE Unicode category constant Cs.
byte TITLECASE_LETTER Unicode category constant Lt.
byte UNASSIGNED Unicode category constant Cn.
byte UPPERCASE_LETTER Unicode category constant Lu.
Fields
public static final Class<Character> TYPE The Class object that represents the primitive type char.
Public Constructors
Character(char value)
Constructs a new Character with the specified primitive char value.
Public Methods
static int charCount(int codePoint)
Calculates the number of char values required to represent the specified Unicode code point.
char charValue()
Gets the primitive value of this character.
static int codePointAt(char[] seq, int index)
Returns the code point at index in the specified array of character units.
static int codePointAt(char[] seq, int index, int limit)
Returns the code point at index in the specified array of character units, where index has to be less than limit.
static int codePointAt(CharSequence seq, int index)
Returns the code point at index in the specified sequence of character units.
static int codePointBefore(CharSequence seq, int index)
Returns the code point that precedes index in the specified sequence of character units.
static int codePointBefore(char[] seq, int index, int start)
Returns the code point that precedes the index in the specified array of character units and is not less than start.
static int codePointBefore(char[] seq, int index)
Returns the code point that precedes index in the specified array of character units.
static int codePointCount(CharSequence seq, int beginIndex, int endIndex)
Counts the number of Unicode code points in the subsequence of the specified character sequence, as delineated by beginIndex and endIndex.
static int codePointCount(char[] seq, int offset, int count)
Counts the number of Unicode code points in the subsequence of the specified char array, as delineated by offset and count.
static int compare(char lhs, char rhs)
Compares two char values.
int compareTo(Character c)
Compares this object to the specified character object to determine their relative order.
static int digit(char c, int radix)
Convenience method to determine the value of the specified character c in the supplied radix.
static int digit(int codePoint, int radix)
Convenience method to determine the value of the character codePoint in the supplied radix.
boolean equals(Object object)
Compares this object with the specified object and indicates if they are equal.
static char forDigit(int digit, int radix)
Returns the character which represents the specified digit in the specified radix.
static byte getDirectionality(int codePoint)
Returns the Unicode directionality of the given code point.
static byte getDirectionality(char c)
Gets the Unicode directionality of the specified character.
static String getName(int codePoint)
Returns a human-readable name for the given code point, or null if the code point is unassigned.
static int getNumericValue(int codePoint)
Gets the numeric value of the specified Unicode code point.
static int getNumericValue(char c)
Returns the numeric value of the specified Unicode character.
static int getType(char c)
Gets the general Unicode category of the specified character.
static int getType(int codePoint)
Gets the general Unicode category of the specified code point.
int hashCode()
Returns an integer hash code for this object.
static char highSurrogate(int codePoint)
Returns the high surrogate for the given code point.
static boolean isAlphabetic(int codePoint)
Returns true if the given code point is alphabetic.
static boolean isBmpCodePoint(int codePoint)
Returns true if the given code point is in the Basic Multilingual Plane (BMP).
static boolean isDefined(int codePoint)
Indicates whether the specified code point is defined in the Unicode specification.
static boolean isDefined(char c)
Indicates whether the specified character is defined in the Unicode specification.
static boolean isDigit(char c)
Indicates whether the specified character is a digit.
static boolean isDigit(int codePoint)
Indicates whether the specified code point is a digit.
static boolean isHighSurrogate(char ch)
Indicates whether ch is a high- (or leading-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
static boolean isISOControl(char c)
Indicates whether the specified character is an ISO control character.
static boolean isISOControl(int c)
Indicates whether the specified code point is an ISO control character.
static boolean isIdentifierIgnorable(char c)
Indicates whether the specified character is ignorable in a Java or Unicode identifier.
static boolean isIdentifierIgnorable(int codePoint)
Indicates whether the specified code point is ignorable in a Java or Unicode identifier.
static boolean isIdeographic(int codePoint)
Returns true if the given code point is a CJKV ideographic character.
static boolean isJavaIdentifierPart(int codePoint)
Indicates whether the specified code point is a valid part of a Java identifier other than the first character.
static boolean isJavaIdentifierPart(char c)
Indicates whether the specified character is a valid part of a Java identifier other than the first character.
static boolean isJavaIdentifierStart(char c)
Indicates whether the specified character is a valid first character for a Java identifier.
static boolean isJavaIdentifierStart(int codePoint)
Indicates whether the specified code point is a valid first character for a Java identifier.
static boolean isJavaLetter(char c)
This method was deprecated in API level 1. Use isJavaIdentifierStart(char) instead.
static boolean isJavaLetterOrDigit(char c)
This method was deprecated in API level 1. Use isJavaIdentifierPart(char) instead.
static boolean isLetter(char c)
Indicates whether the specified character is a letter.
static boolean isLetter(int codePoint)
Indicates whether the specified code point is a letter.
static boolean isLetterOrDigit(char c)
Indicates whether the specified character is a letter or a digit.
static boolean isLetterOrDigit(int codePoint)
Indicates whether the specified code point is a letter or a digit.
static boolean isLowSurrogate(char ch)
Indicates whether ch is a low- (or trailing-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
static boolean isLowerCase(int codePoint)
Indicates whether the specified code point is a lower case letter.
static boolean isLowerCase(char c)
Indicates whether the specified character is a lower case letter.
static boolean isMirrored(char c)
Indicates whether the specified character is mirrored.
static boolean isMirrored(int codePoint)
Indicates whether the specified code point is mirrored.
static boolean isSpace(char c)
This method was deprecated in API level 1. Use isWhitespace(char) instead.
static boolean isSpaceChar(char c)
static boolean isSpaceChar(int codePoint)
Returns true if the given code point is a Unicode space character.
static boolean isSupplementaryCodePoint(int codePoint)
Indicates whether codePoint is within the supplementary code point range.
static boolean isSurrogate(char ch)
Returns true if the given character is a high or low surrogate.
static boolean isSurrogatePair(char high, char low)
Indicates whether the specified character pair is a valid surrogate pair.
static boolean isTitleCase(int codePoint)
Indicates whether the specified code point is a titlecase character.
static boolean isTitleCase(char c)
Indicates whether the specified character is a titlecase character.
static boolean isUnicodeIdentifierPart(int codePoint)
Indicates whether the specified code point is valid as part of a Unicode identifier other than the first character.
static boolean isUnicodeIdentifierPart(char c)
Indicates whether the specified character is valid as part of a Unicode identifier other than the first character.
static boolean isUnicodeIdentifierStart(char c)
Indicates whether the specified character is a valid initial character for a Unicode identifier.
static boolean isUnicodeIdentifierStart(int codePoint)
Indicates whether the specified code point is a valid initial character for a Unicode identifier.
static boolean isUpperCase(int codePoint)
Indicates whether the specified code point is an upper case letter.
static boolean isUpperCase(char c)
Indicates whether the specified character is an upper case letter.
static boolean isValidCodePoint(int codePoint)
Indicates whether codePoint is a valid Unicode code point.
static boolean isWhitespace(char c)
static boolean isWhitespace(int codePoint)
Returns true if the given code point is a Unicode whitespace character.
static char lowSurrogate(int codePoint)
Returns the low surrogate for the given code point.
static int offsetByCodePoints(CharSequence seq, int index, int codePointOffset)
Determines the index in the specified character sequence that is offset codePointOffset code points from index.
static int offsetByCodePoints(char[] seq, int start, int count, int index, int codePointOffset)
Determines the index in a subsequence of the specified character array that is offset codePointOffset code points from index.
static char reverseBytes(char c)
Reverses the order of the first and second byte in the specified character.
static char[] toChars(int codePoint)
Converts the specified Unicode code point into a UTF-16 encoded sequence and returns it as a char array.
static int toChars(int codePoint, char[] dst, int dstIndex)
Converts the specified Unicode code point into a UTF-16 encoded sequence and copies the value(s) into the char array dst, starting at index dstIndex.
static int toCodePoint(char high, char low)
Converts a surrogate pair into a Unicode code point.
static char toLowerCase(char c)
Returns the lower case equivalent for the specified character if the character is an upper case letter.
static int toLowerCase(int codePoint)
Returns the lower case equivalent for the specified code point if it is an upper case letter.
static String toString(char value)
Converts the specified character to its string representation.
String toString()
Returns a string containing a concise, human-readable description of this object.
static char toTitleCase(char c)
Returns the title case equivalent for the specified character if it exists.
static int toTitleCase(int codePoint)
Returns the title case equivalent for the specified code point if it exists.
static char toUpperCase(char c)
Returns the upper case equivalent for the specified character if the character is a lower case letter.
static int toUpperCase(int codePoint)
Returns the upper case equivalent for the specified code point if the code point is a lower case letter.
static Character valueOf(char c)
Returns a Character instance for the char value passed.
[Expand]
Inherited Methods
From class java.lang.Object
From interface java.lang.Comparable

Constants

public static final byte COMBINING_SPACING_MARK

Added in API level 1

Unicode category constant Mc.

Constant Value: 8 (0x00000008)

public static final byte CONNECTOR_PUNCTUATION

Added in API level 1

Unicode category constant Pc.

Constant Value: 23 (0x00000017)

public static final byte CONTROL

Added in API level 1

Unicode category constant Cc.

Constant Value: 15 (0x0000000f)

public static final byte CURRENCY_SYMBOL

Added in API level 1

Unicode category constant Sc.

Constant Value: 26 (0x0000001a)

public static final byte DASH_PUNCTUATION

Added in API level 1

Unicode category constant Pd.

Constant Value: 20 (0x00000014)

public static final byte DECIMAL_DIGIT_NUMBER

Added in API level 1

Unicode category constant Nd.

Constant Value: 9 (0x00000009)

public static final byte DIRECTIONALITY_ARABIC_NUMBER

Added in API level 1

Unicode bidirectional constant AN.

Constant Value: 6 (0x00000006)

public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL

Added in API level 1

Unicode bidirectional constant BN.

Constant Value: 9 (0x00000009)

public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

Added in API level 1

Unicode bidirectional constant CS.

Constant Value: 7 (0x00000007)

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER

Added in API level 1

Unicode bidirectional constant EN.

Constant Value: 3 (0x00000003)

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

Added in API level 1

Unicode bidirectional constant ES.

Constant Value: 4 (0x00000004)

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

Added in API level 1

Unicode bidirectional constant ET.

Constant Value: 5 (0x00000005)

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT

Added in API level 1

Unicode bidirectional constant L.

Constant Value: 0 (0x00000000)

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

Added in API level 1

Unicode bidirectional constant LRE.

Constant Value: 14 (0x0000000e)

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

Added in API level 1

Unicode bidirectional constant LRO.

Constant Value: 15 (0x0000000f)

public static final byte DIRECTIONALITY_NONSPACING_MARK

Added in API level 1

Unicode bidirectional constant NSM.

Constant Value: 8 (0x00000008)

public static final byte DIRECTIONALITY_OTHER_NEUTRALS

Added in API level 1

Unicode bidirectional constant ON.

Constant Value: 13 (0x0000000d)

public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR

Added in API level 1

Unicode bidirectional constant B.

Constant Value: 10 (0x0000000a)

public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

Added in API level 1

Unicode bidirectional constant PDF.

Constant Value: 18 (0x00000012)

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT

Added in API level 1

Unicode bidirectional constant R.

Constant Value: 1 (0x00000001)

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

Added in API level 1

Unicode bidirectional constant AL.

Constant Value: 2 (0x00000002)

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

Added in API level 1

Unicode bidirectional constant RLE.

Constant Value: 16 (0x00000010)

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

Added in API level 1

Unicode bidirectional constant RLO.

Constant Value: 17 (0x00000011)

public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR

Added in API level 1

Unicode bidirectional constant S.

Constant Value: 11 (0x0000000b)

public static final byte DIRECTIONALITY_UNDEFINED

Added in API level 1

Unicode bidirectional constant.

Constant Value: -1 (0xffffffff)

public static final byte DIRECTIONALITY_WHITESPACE

Added in API level 1

Unicode bidirectional constant WS.

Constant Value: 12 (0x0000000c)

public static final byte ENCLOSING_MARK

Added in API level 1

Unicode category constant Me.

Constant Value: 7 (0x00000007)

public static final byte END_PUNCTUATION

Added in API level 1

Unicode category constant Pe.

Constant Value: 22 (0x00000016)

public static final byte FINAL_QUOTE_PUNCTUATION

Added in API level 1

Unicode category constant Pf.

Constant Value: 30 (0x0000001e)

public static final byte FORMAT

Added in API level 1

Unicode category constant Cf.

Constant Value: 16 (0x00000010)

public static final byte INITIAL_QUOTE_PUNCTUATION

Added in API level 1

Unicode category constant Pi.

Constant Value: 29 (0x0000001d)

public static final byte LETTER_NUMBER

Added in API level 1

Unicode category constant Nl.

Constant Value: 10 (0x0000000a)

public static final byte LINE_SEPARATOR

Added in API level 1

Unicode category constant Zl.

Constant Value: 13 (0x0000000d)

public static final byte LOWERCASE_LETTER

Added in API level 1

Unicode category constant Ll.

Constant Value: 2 (0x00000002)

public static final byte MATH_SYMBOL

Added in API level 1

Unicode category constant Sm.

Constant Value: 25 (0x00000019)

public static final int MAX_CODE_POINT

Added in API level 1

The maximum code point value, U+10FFFF.

Constant Value: 1114111 (0x0010ffff)

public static final char MAX_HIGH_SURROGATE

Added in API level 1

The maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.

Constant Value: 56319 (0x0000dbff)

public static final char MAX_LOW_SURROGATE

Added in API level 1

The maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.

Constant Value: 57343 (0x0000dfff)

public static final int MAX_RADIX

Added in API level 1

The maximum radix used for conversions between characters and integers.

Constant Value: 36 (0x00000024)

public static final char MAX_SURROGATE

Added in API level 1

The maximum value of a surrogate unit in UTF-16 encoding, '?'.

Constant Value: 57343 (0x0000dfff)

public static final char MAX_VALUE

Added in API level 1

The maximum Character value.

Constant Value: 65535 (0x0000ffff)

public static final int MIN_CODE_POINT

Added in API level 1

The minimum code point value, U+0000.

Constant Value: 0 (0x00000000)

public static final char MIN_HIGH_SURROGATE

Added in API level 1

The minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.

Constant Value: 55296 (0x0000d800)

public static final char MIN_LOW_SURROGATE

Added in API level 1

The minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.

Constant Value: 56320 (0x0000dc00)

public static final int MIN_RADIX

Added in API level 1

The minimum radix used for conversions between characters and integers.

Constant Value: 2 (0x00000002)

public static final int MIN_SUPPLEMENTARY_CODE_POINT

Added in API level 1

The minimum value of a supplementary code point, U+010000.

Constant Value: 65536 (0x00010000)

public static final char MIN_SURROGATE

Added in API level 1

The minimum value of a surrogate unit in UTF-16 encoding, '?'.

Constant Value: 55296 (0x0000d800)

public static final char MIN_VALUE

Added in API level 1

The minimum Character value.

Constant Value: 0 (0x00000000)

public static final byte MODIFIER_LETTER

Added in API level 1

Unicode category constant Lm.

Constant Value: 4 (0x00000004)

public static final byte MODIFIER_SYMBOL

Added in API level 1

Unicode category constant Sk.

Constant Value: 27 (0x0000001b)

public static final byte NON_SPACING_MARK

Added in API level 1

Unicode category constant Mn.

Constant Value: 6 (0x00000006)

public static final byte OTHER_LETTER

Added in API level 1

Unicode category constant Lo.

Constant Value: 5 (0x00000005)

public static final byte OTHER_NUMBER

Added in API level 1

Unicode category constant No.

Constant Value: 11 (0x0000000b)

public static final byte OTHER_PUNCTUATION

Added in API level 1

Unicode category constant Po.

Constant Value: 24 (0x00000018)

public static final byte OTHER_SYMBOL

Added in API level 1

Unicode category constant So.

Constant Value: 28 (0x0000001c)

public static final byte PARAGRAPH_SEPARATOR

Added in API level 1

Unicode category constant Zp.

Constant Value: 14 (0x0000000e)

public static final byte PRIVATE_USE

Added in API level 1

Unicode category constant Co.

Constant Value: 18 (0x00000012)

public static final int SIZE

Added in API level 1

The number of bits required to represent a Character value unsigned form.

Constant Value: 16 (0x00000010)

public static final byte SPACE_SEPARATOR

Added in API level 1

Unicode category constant Zs.

Constant Value: 12 (0x0000000c)

public static final byte START_PUNCTUATION

Added in API level 1

Unicode category constant Ps.

Constant Value: 21 (0x00000015)

public static final byte SURROGATE

Added in API level 1

Unicode category constant Cs.

Constant Value: 19 (0x00000013)

public static final byte TITLECASE_LETTER

Added in API level 1

Unicode category constant Lt.

Constant Value: 3 (0x00000003)

public static final byte UNASSIGNED

Added in API level 1

Unicode category constant Cn.

Constant Value: 0 (0x00000000)

public static final byte UPPERCASE_LETTER

Added in API level 1

Unicode category constant Lu.

Constant Value: 1 (0x00000001)

Fields

public static final Class<Character> TYPE

Added in API level 1

The Class object that represents the primitive type char.

Public Constructors

public Character (char value)

Added in API level 1

Constructs a new Character with the specified primitive char value.

Parameters
value the primitive char value to store in the new instance.

Public Methods

public static int charCount (int codePoint)

Added in API level 1

Calculates the number of char values required to represent the specified Unicode code point. This method checks if the codePoint is greater than or equal to 0x10000, in which case 2 is returned, otherwise 1. To test if the code point is valid, use the isValidCodePoint(int) method.

Parameters
codePoint the code point for which to calculate the number of required chars.
Returns
int 2 if codePoint >= 0x10000; 1 otherwise.

public char charValue ()

Added in API level 1

Gets the primitive value of this character.

Returns
char this object's primitive value.

public static int codePointAt (char[] seq, int index)

Added in API level 1

Returns the code point at index in the specified array of character units. If the unit at index is a high-surrogate unit, index + 1 is less than the length of the array and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.

Parameters
seq the source array of char units.
index the position in seq from which to retrieve the code point.
Returns
int the Unicode code point or char value at index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if the index is negative or greater than or equal to the length of seq.

public static int codePointAt (char[] seq, int index, int limit)

Added in API level 1

Returns the code point at index in the specified array of character units, where index has to be less than limit. If the unit at index is a high-surrogate unit, index + 1 is less than limit and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.

Parameters
seq the source array of char units.
index the position in seq from which to get the code point.
limit the index after the last unit in seq that can be used.
Returns
int the Unicode code point or char value at index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if index < 0, index >= limit, limit < 0 or if limit is greater than the length of seq.

public static int codePointAt (CharSequence seq, int index)

Added in API level 1

Returns the code point at index in the specified sequence of character units. If the unit at index is a high-surrogate unit, index + 1 is less than the length of the sequence and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.

Parameters
seq the source sequence of char units.
index the position in seq from which to retrieve the code point.
Returns
int the Unicode code point or char value at index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if the index is negative or greater than or equal to the length of seq.

public static int codePointBefore (CharSequence seq, int index)

Added in API level 1

Returns the code point that precedes index in the specified sequence of character units. If the unit at index - 1 is a low-surrogate unit, index - 2 is not negative and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.

Parameters
seq the source sequence of char units.
index the position in seq following the code point that should be returned.
Returns
int the Unicode code point or char value before index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if the index is less than 1 or greater than the length of seq.

public static int codePointBefore (char[] seq, int index, int start)

Added in API level 1

Returns the code point that precedes the index in the specified array of character units and is not less than start. If the unit at index - 1 is a low-surrogate unit, index - 2 is not less than start and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.

Parameters
seq the source array of char units.
index the position in seq following the code point that should be returned.
start the index of the first element in seq.
Returns
int the Unicode code point or char value before index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if the index <= start, start < 0, index is greater than the length of seq, or if start is equal or greater than the length of seq.

public static int codePointBefore (char[] seq, int index)

Added in API level 1

Returns the code point that precedes index in the specified array of character units. If the unit at index - 1 is a low-surrogate unit, index - 2 is not negative and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.

Parameters
seq the source array of char units.
index the position in seq following the code point that should be returned.
Returns
int the Unicode code point or char value before index in seq.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if the index is less than 1 or greater than the length of seq.

public static int codePointCount (CharSequence seq, int beginIndex, int endIndex)

Added in API level 1

Counts the number of Unicode code points in the subsequence of the specified character sequence, as delineated by beginIndex and endIndex. Any surrogate values with missing pair values will be counted as one code point.

Parameters
seq the CharSequence to look through.
beginIndex the inclusive index to begin counting at.
endIndex the exclusive index to stop counting at.
Returns
int the number of Unicode code points.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if beginIndex < 0, beginIndex > endIndex or if endIndex is greater than the length of seq.

public static int codePointCount (char[] seq, int offset, int count)

Added in API level 1

Counts the number of Unicode code points in the subsequence of the specified char array, as delineated by offset and count. Any surrogate values with missing pair values will be counted as one code point.

Parameters
seq the char array to look through
offset the inclusive index to begin counting at.
count the number of char values to look through in seq.
Returns
int the number of Unicode code points.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if offset < 0, count < 0 or if offset + count is greater than the length of seq.

public static int compare (char lhs, char rhs)

Added in API level 19

Compares two char values.

Parameters
lhs
rhs
Returns
int 0 if lhs = rhs, less than 0 if lhs < rhs, and greater than 0 if lhs > rhs.

public int compareTo (Character c)

Added in API level 1

Compares this object to the specified character object to determine their relative order.

Parameters
c the character object to compare this object to.
Returns
int 0 if the value of this character and the value of c are equal; a positive value if the value of this character is greater than the value of c; a negative value if the value of this character is less than the value of c.

See also:

public static int digit (char c, int radix)

Added in API level 1

Convenience method to determine the value of the specified character c in the supplied radix. The value of radix must be between MIN_RADIX and MAX_RADIX.

Parameters
c the character to determine the value of.
radix the radix.
Returns
int the value of c in radix if radix lies between MIN_RADIX and MAX_RADIX; -1 otherwise.

public static int digit (int codePoint, int radix)

Added in API level 1

Convenience method to determine the value of the character codePoint in the supplied radix. The value of radix must be between MIN_RADIX and MAX_RADIX.

Parameters
codePoint the character, including supplementary characters.
radix the radix.
Returns
int if radix lies between MIN_RADIX and MAX_RADIX then the value of the character in the radix; -1 otherwise.

public boolean equals (Object object)

Added in API level 1

Compares this object with the specified object and indicates if they are equal. In order to be equal, object must be an instance of Character and have the same char value as this object.

Parameters
object the object to compare this double with.
Returns
boolean true if the specified object is equal to this Character; false otherwise.

public static char forDigit (int digit, int radix)

Added in API level 1

Returns the character which represents the specified digit in the specified radix. The radix must be between MIN_RADIX and MAX_RADIX inclusive; digit must not be negative and smaller than radix. If any of these conditions does not hold, 0 is returned.

Parameters
digit the integer value.
radix the radix.
Returns
char the character which represents the digit in the radix.

public static byte getDirectionality (int codePoint)

Added in API level 1

Returns the Unicode directionality of the given code point. This will be one of the DIRECTIONALITY_ constants. For characters whose directionality is undefined, or whose directionality has no appropriate constant in this class, DIRECTIONALITY_UNDEFINED is returned.

Parameters
codePoint
Returns
byte

public static byte getDirectionality (char c)

Added in API level 1

Gets the Unicode directionality of the specified character.

Parameters
c the character to get the directionality of.
Returns
byte the Unicode directionality of c.

public static String getName (int codePoint)

Added in API level 19

Returns a human-readable name for the given code point, or null if the code point is unassigned.

As a fallback mechanism this method returns strings consisting of the Unicode block name (with underscores replaced by spaces), a single space, and the uppercase hex value of the code point, using as few digits as necessary.

Examples:

  • Character.getName(0) returns "NULL".
  • Character.getName('e') returns "LATIN SMALL LETTER E".
  • Character.getName('٦') returns "ARABIC-INDIC DIGIT SIX".
  • Character.getName(0xe000) returns "PRIVATE USE AREA E000".

Note that the exact strings returned will vary from release to release.

Parameters
codePoint
Returns
String
Throws
IllegalArgumentException if codePoint is not a valid code point.

public static int getNumericValue (int codePoint)

Added in API level 1

Gets the numeric value of the specified Unicode code point. For example, the code point 'Ⅻ' stands for the Roman number XII, which has the numeric value 12.

There are two points of divergence between this method and the Unicode specification. This method treats the letters a-z (in both upper and lower cases, and their full-width variants) as numbers from 10 to 35. The Unicode specification also supports the idea of code points with non-integer numeric values; this method does not (except to the extent of returning -2 for such code points).

Parameters
codePoint the code point
Returns
int a non-negative numeric integer value if a numeric value for codePoint exists, -1 if there is no numeric value for codePoint, -2 if the numeric value can not be represented with an integer.

public static int getNumericValue (char c)

Added in API level 1

Returns the numeric value of the specified Unicode character. See getNumericValue(int).

Parameters
c the character
Returns
int a non-negative numeric integer value if a numeric value for c exists, -1 if there is no numeric value for c, -2 if the numeric value can not be represented as an integer.

public static int getType (char c)

Added in API level 1

Gets the general Unicode category of the specified character.

Parameters
c the character to get the category of.
Returns
int the Unicode category of c.

public static int getType (int codePoint)

Added in API level 1

Gets the general Unicode category of the specified code point.

Parameters
codePoint the Unicode code point to get the category of.
Returns
int the Unicode category of codePoint.

public int hashCode ()

Added in API level 1

Returns an integer hash code for this object. By contract, any two objects for which equals(Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

Note that hash values must not change over time unless information used in equals comparisons also changes.

See Writing a correct hashCode method if you intend implementing your own hashCode method.

Returns
int this object's hash code.

public static char highSurrogate (int codePoint)

Added in API level 19

Returns the high surrogate for the given code point. The result is meaningless if the given code point is not a supplementary character.

Parameters
codePoint
Returns
char

public static boolean isAlphabetic (int codePoint)

Added in API level 19

Returns true if the given code point is alphabetic. That is, if it is in any of the Lu, Ll, Lt, Lm, Lo, Nl, or Other_Alphabetic categories.

Parameters
codePoint
Returns
boolean

public static boolean isBmpCodePoint (int codePoint)

Added in API level 19

Returns true if the given code point is in the Basic Multilingual Plane (BMP). Such code points can be represented by a single char.

Parameters
codePoint
Returns
boolean

public static boolean isDefined (int codePoint)

Added in API level 1

Indicates whether the specified code point is defined in the Unicode specification.

Parameters
codePoint the code point to check.
Returns
boolean true if the general Unicode category of the code point is not UNASSIGNED; false otherwise.

public static boolean isDefined (char c)

Added in API level 1

Indicates whether the specified character is defined in the Unicode specification.

Parameters
c the character to check.
Returns
boolean true if the general Unicode category of the character is not UNASSIGNED; false otherwise.

public static boolean isDigit (char c)

Added in API level 1

Indicates whether the specified character is a digit.

Parameters
c the character to check.
Returns
boolean true if c is a digit; false otherwise.

public static boolean isDigit (int codePoint)

Added in API level 1

Indicates whether the specified code point is a digit.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a digit; false otherwise.

public static boolean isHighSurrogate (char ch)

Added in API level 1

Indicates whether ch is a high- (or leading-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.

Parameters
ch the character to test.
Returns
boolean true if ch is a high-surrogate code unit; false otherwise.

public static boolean isISOControl (char c)

Added in API level 1

Indicates whether the specified character is an ISO control character.

Parameters
c the character to check.
Returns
boolean true if c is an ISO control character; false otherwise.

public static boolean isISOControl (int c)

Added in API level 1

Indicates whether the specified code point is an ISO control character.

Parameters
c the code point to check.
Returns
boolean true if c is an ISO control character; false otherwise.

public static boolean isIdentifierIgnorable (char c)

Added in API level 1

Indicates whether the specified character is ignorable in a Java or Unicode identifier.

Parameters
c the character to check.
Returns
boolean true if c is ignorable; false otherwise.

public static boolean isIdentifierIgnorable (int codePoint)

Added in API level 1

Indicates whether the specified code point is ignorable in a Java or Unicode identifier.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is ignorable; false otherwise.

public static boolean isIdeographic (int codePoint)

Added in API level 19

Returns true if the given code point is a CJKV ideographic character.

Parameters
codePoint
Returns
boolean

public static boolean isJavaIdentifierPart (int codePoint)

Added in API level 1

Indicates whether the specified code point is a valid part of a Java identifier other than the first character.

Parameters
codePoint the code point to check.
Returns
boolean true if c is valid as part of a Java identifier; false otherwise.

public static boolean isJavaIdentifierPart (char c)

Added in API level 1

Indicates whether the specified character is a valid part of a Java identifier other than the first character.

Parameters
c the character to check.
Returns
boolean true if c is valid as part of a Java identifier; false otherwise.

public static boolean isJavaIdentifierStart (char c)

Added in API level 1

Indicates whether the specified character is a valid first character for a Java identifier.

Parameters
c the character to check.
Returns
boolean true if c is a valid first character of a Java identifier; false otherwise.

public static boolean isJavaIdentifierStart (int codePoint)

Added in API level 1

Indicates whether the specified code point is a valid first character for a Java identifier.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a valid start of a Java identifier; false otherwise.

public static boolean isJavaLetter (char c)

Added in API level 1

This method was deprecated in API level 1.
Use isJavaIdentifierStart(char) instead.

Indicates whether the specified character is a Java letter.

Parameters
c the character to check.
Returns
boolean true if c is a Java letter; false otherwise.

public static boolean isJavaLetterOrDigit (char c)

Added in API level 1

This method was deprecated in API level 1.
Use isJavaIdentifierPart(char) instead.

Indicates whether the specified character is a Java letter or digit character.

Parameters
c the character to check.
Returns
boolean true if c is a Java letter or digit; false otherwise.

public static boolean isLetter (char c)

Added in API level 1

Indicates whether the specified character is a letter.

Parameters
c the character to check.
Returns
boolean true if c is a letter; false otherwise.

public static boolean isLetter (int codePoint)

Added in API level 1

Indicates whether the specified code point is a letter.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a letter; false otherwise.

public static boolean isLetterOrDigit (char c)

Added in API level 1

Indicates whether the specified character is a letter or a digit.

Parameters
c the character to check.
Returns
boolean true if c is a letter or a digit; false otherwise.

public static boolean isLetterOrDigit (int codePoint)

Added in API level 1

Indicates whether the specified code point is a letter or a digit.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a letter or a digit; false otherwise.

public static boolean isLowSurrogate (char ch)

Added in API level 1

Indicates whether ch is a low- (or trailing-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.

Parameters
ch the character to test.
Returns
boolean true if ch is a low-surrogate code unit; false otherwise.

public static boolean isLowerCase (int codePoint)

Added in API level 1

Indicates whether the specified code point is a lower case letter.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a lower case letter; false otherwise.

public static boolean isLowerCase (char c)

Added in API level 1

Indicates whether the specified character is a lower case letter.

Parameters
c the character to check.
Returns
boolean true if c is a lower case letter; false otherwise.

public static boolean isMirrored (char c)

Added in API level 1

Indicates whether the specified character is mirrored.

Parameters
c the character to check.
Returns
boolean true if c is mirrored; false otherwise.

public static boolean isMirrored (int codePoint)

Added in API level 1

Indicates whether the specified code point is mirrored.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is mirrored, false otherwise.

public static boolean isSpace (char c)

Added in API level 1

This method was deprecated in API level 1.
Use isWhitespace(char) instead.

Use isWhitespace(char) instead.

Parameters
c
Returns
boolean

public static boolean isSpaceChar (char c)

Added in API level 1

See isSpaceChar(int).

Parameters
c
Returns
boolean

public static boolean isSpaceChar (int codePoint)

Added in API level 1

Returns true if the given code point is a Unicode space character. The exact set of characters considered as whitespace varies with Unicode version. Note that non-breaking spaces are considered whitespace. Note also that line separators are not considered whitespace; see isWhitespace(char) for an alternative.

Parameters
codePoint
Returns
boolean

public static boolean isSupplementaryCodePoint (int codePoint)

Added in API level 1

Indicates whether codePoint is within the supplementary code point range.

Parameters
codePoint the code point to test.
Returns
boolean true if codePoint is within the supplementary code point range; false otherwise.

public static boolean isSurrogate (char ch)

Added in API level 19

Returns true if the given character is a high or low surrogate.

Parameters
ch
Returns
boolean

public static boolean isSurrogatePair (char high, char low)

Added in API level 1

Indicates whether the specified character pair is a valid surrogate pair.

Parameters
high the high surrogate unit to test.
low the low surrogate unit to test.
Returns
boolean true if high is a high-surrogate code unit and low is a low-surrogate code unit; false otherwise.

public static boolean isTitleCase (int codePoint)

Added in API level 1

Indicates whether the specified code point is a titlecase character.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a titlecase character, false otherwise.

public static boolean isTitleCase (char c)

Added in API level 1

Indicates whether the specified character is a titlecase character.

Parameters
c the character to check.
Returns
boolean true if c is a titlecase character, false otherwise.

public static boolean isUnicodeIdentifierPart (int codePoint)

Added in API level 1

Indicates whether the specified code point is valid as part of a Unicode identifier other than the first character.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is valid as part of a Unicode identifier; false otherwise.

public static boolean isUnicodeIdentifierPart (char c)

Added in API level 1

Indicates whether the specified character is valid as part of a Unicode identifier other than the first character.

Parameters
c the character to check.
Returns
boolean true if c is valid as part of a Unicode identifier; false otherwise.

public static boolean isUnicodeIdentifierStart (char c)

Added in API level 1

Indicates whether the specified character is a valid initial character for a Unicode identifier.

Parameters
c the character to check.
Returns
boolean true if c is a valid first character for a Unicode identifier; false otherwise.

public static boolean isUnicodeIdentifierStart (int codePoint)

Added in API level 1

Indicates whether the specified code point is a valid initial character for a Unicode identifier.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a valid first character for a Unicode identifier; false otherwise.

public static boolean isUpperCase (int codePoint)

Added in API level 1

Indicates whether the specified code point is an upper case letter.

Parameters
codePoint the code point to check.
Returns
boolean true if codePoint is a upper case letter; false otherwise.

public static boolean isUpperCase (char c)

Added in API level 1

Indicates whether the specified character is an upper case letter.

Parameters
c the character to check.
Returns
boolean true if c is a upper case letter; false otherwise.

public static boolean isValidCodePoint (int codePoint)

Added in API level 1

Indicates whether codePoint is a valid Unicode code point.

Parameters
codePoint the code point to test.
Returns
boolean true if codePoint is a valid Unicode code point; false otherwise.

public static boolean isWhitespace (char c)

Added in API level 1

See isWhitespace(int).

Parameters
c
Returns
boolean

public static boolean isWhitespace (int codePoint)

Added in API level 1

Returns true if the given code point is a Unicode whitespace character. The exact set of characters considered as whitespace varies with Unicode version. Note that non-breaking spaces are not considered whitespace. Note also that line separators are considered whitespace; see isSpaceChar(char) for an alternative.

Parameters
codePoint
Returns
boolean

public static char lowSurrogate (int codePoint)

Added in API level 19

Returns the low surrogate for the given code point. The result is meaningless if the given code point is not a supplementary character.

Parameters
codePoint
Returns
char

public static int offsetByCodePoints (CharSequence seq, int index, int codePointOffset)

Added in API level 1

Determines the index in the specified character sequence that is offset codePointOffset code points from index.

Parameters
seq the character sequence to find the index in.
index the start index in seq.
codePointOffset the number of code points to look backwards or forwards; may be a negative or positive value.
Returns
int the index in seq that is codePointOffset code points away from index.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if index < 0, index is greater than the length of seq, or if there are not enough values in seq to skip codePointOffset code points forwards or backwards (if codePointOffset is negative) from index.

public static int offsetByCodePoints (char[] seq, int start, int count, int index, int codePointOffset)

Added in API level 1

Determines the index in a subsequence of the specified character array that is offset codePointOffset code points from index. The subsequence is delineated by start and count.

Parameters
seq the character array to find the index in.
start the inclusive index that marks the beginning of the subsequence.
count the number of char values to include within the subsequence.
index the start index in the subsequence of the char array.
codePointOffset the number of code points to look backwards or forwards; may be a negative or positive value.
Returns
int the index in seq that is codePointOffset code points away from index.
Throws
NullPointerException if seq is null.
IndexOutOfBoundsException if start < 0, count < 0, index < start, index > start + count, start + count is greater than the length of seq, or if there are not enough values in seq to skip codePointOffset code points forward or backward (if codePointOffset is negative) from index.

public static char reverseBytes (char c)

Added in API level 1

Reverses the order of the first and second byte in the specified character.

Parameters
c the character to reverse.
Returns
char the character with reordered bytes.

public static char[] toChars (int codePoint)

Added in API level 1

Converts the specified Unicode code point into a UTF-16 encoded sequence and returns it as a char array.

Parameters
codePoint the Unicode code point to encode.
Returns
char[] the UTF-16 encoded char sequence. If codePoint is a supplementary code point, then the returned array contains two characters, otherwise it contains just one character.
Throws
IllegalArgumentException if codePoint is not a valid code point.

public static int toChars (int codePoint, char[] dst, int dstIndex)

Added in API level 1

Converts the specified Unicode code point into a UTF-16 encoded sequence and copies the value(s) into the char array dst, starting at index dstIndex.

Parameters
codePoint the Unicode code point to encode.
dst the destination array to copy the encoded value into.
dstIndex the index in dst from where to start copying.
Returns
int the number of char value units copied into dst.
Throws
IllegalArgumentException if codePoint is not a valid code point.
NullPointerException if dst is null.
IndexOutOfBoundsException if dstIndex is negative, greater than or equal to dst.length or equals dst.length - 1 when codePoint is a supplementary code point.

public static int toCodePoint (char high, char low)

Added in API level 1

Converts a surrogate pair into a Unicode code point. This method assumes that the pair are valid surrogates. If the pair are not valid surrogates, then the result is indeterminate. The isSurrogatePair(char, char) method should be used prior to this method to validate the pair.

Parameters
high the high surrogate unit.
low the low surrogate unit.
Returns
int the Unicode code point corresponding to the surrogate unit pair.

public static char toLowerCase (char c)

Added in API level 1

Returns the lower case equivalent for the specified character if the character is an upper case letter. Otherwise, the specified character is returned unchanged.

Parameters
c the character
Returns
char if c is an upper case character then its lower case counterpart, otherwise just c.

public static int toLowerCase (int codePoint)

Added in API level 1

Returns the lower case equivalent for the specified code point if it is an upper case letter. Otherwise, the specified code point is returned unchanged.

Parameters
codePoint the code point to check.
Returns
int if codePoint is an upper case character then its lower case counterpart, otherwise just codePoint.

public static String toString (char value)

Added in API level 1

Converts the specified character to its string representation.

Parameters
value the character to convert.
Returns
String the character converted to a string.

public String toString ()

Added in API level 1

Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

   getClass().getName() + '@' + Integer.toHexString(hashCode())

See Writing a useful toString method if you intend implementing your own toString method.

Returns
String a printable representation of this object.

public static char toTitleCase (char c)

Added in API level 1

Returns the title case equivalent for the specified character if it exists. Otherwise, the specified character is returned unchanged.

Parameters
c the character to convert.
Returns
char the title case equivalent of c if it exists, otherwise c.

public static int toTitleCase (int codePoint)

Added in API level 1

Returns the title case equivalent for the specified code point if it exists. Otherwise, the specified code point is returned unchanged.

Parameters
codePoint the code point to convert.
Returns
int the title case equivalent of codePoint if it exists, otherwise codePoint.

public static char toUpperCase (char c)

Added in API level 1

Returns the upper case equivalent for the specified character if the character is a lower case letter. Otherwise, the specified character is returned unchanged.

Parameters
c the character to convert.
Returns
char if c is a lower case character then its upper case counterpart, otherwise just c.

public static int toUpperCase (int codePoint)

Added in API level 1

Returns the upper case equivalent for the specified code point if the code point is a lower case letter. Otherwise, the specified code point is returned unchanged.

Parameters
codePoint the code point to convert.
Returns
int if codePoint is a lower case character then its upper case counterpart, otherwise just codePoint.

public static Character valueOf (char c)

Added in API level 1

Returns a Character instance for the char value passed.

If it is not necessary to get a new Character instance, it is recommended to use this method instead of the constructor, since it maintains a cache of instances which may result in better performance.

Parameters
c the char value for which to get a Character instance.
Returns
Character the Character instance for c.